The level of faunation of rumen in relation to some factors of nitrogen-metabolism of lambs.
| Autor: | Feješ, Ján, 1927-2012 |
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| Další autoři: |
Várady, Jozef, 1939-
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| Jazyk: | angličtina |
| Předmět: | |
| Druh dokumentu: | Non-fiction |
| ISSN: | 0862-8408 |
| Abstrakt: | Abstract: Our experiments on metabolic processes in the rumen were performed on sixteen 5-month-old lambs divided into 4 groups (defaunated - D, totally refaunated - T, partially refaunated - P and intact - 1). The absence or presence of protozoa in the rumen did not significantly affect the pH values. The greatest differences in NH₃ concentration in the rumen before feeding were found between the T and D group (P<0.05). The animals of the T and I groups had higher NH₃ concentrations than the D and P groups 1-5 hours after feeding (P<0.05 to P<0,001). Blood urea concentrations before and after feeding were significantly higher in the group I compared to the other groups (P<0.05 to P<0,001). Significant differences in the total nitrogen in rumen fluid were only found between groups D and I. The values of protozoan nitrogen in the rumen and their mutual relationship among the groups could be expressed by the following ratios: I>T>P>D. Proportions of the values of bacterial nitrogen followed in this order: D>P>T>I. The animals in group D had a significantly higher level of residual nitrogen than those in the other groups (P<0.05). |
| Databáze: | Katalog Knihovny AV ČR |
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